First guess at region hints for FFT.
First guess at region hints for FFT.

- Some of the "memory" phases call into subroutines like fft2
  which appear to be compute intensive.
- Need to understand if these subroutine calls are more important
  than the memory transfers going on in the same region.
- Regions boundries may need to be redefined.
- Updated hints based on JLSE frequency sweeps.

Change-Id: Ia519eaa08ad8d7b4e58718abaae5669f19c047b9
Signed-off-by: Christopher M. Cantalupo <9cf3ecca60a3dd7112ab0e7250bedb8a752e3958@intel.com>

geopm/geopm,cmcantalupo/geopm,cmcantalupo/geopm,cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,cmcantalupo/geopm,geopm/geopm,geopm/geopm,geopm/geopm